Funnily enough it was the moustache methods used on the Block Editor that influenced how we should build our Text Fallback package:
https://our.umbraco.com/packages/website-utilities/wholething-fallback-text-property/
For example:
The fallback template supports the following node references:
Node ID: {{1069:propertyAlias}}
Parent node: {{parent:propertyAlias}}
Root node: {{root:propertyAlias}}
Ancestor by content type alias: {{ancestor(blogPost):propertyAlias}}